Obama Raised Half a Billion Online, Washington Post.

In an exclusive interview with The Post, members of the vaunted Triple O, Obama's online operation, broke down the numbers: 3 million donors made a total of 6.5 million donations online adding up to more than $500 million. Of those 6.5 million donations, 6 million were in increments of $100 or less

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A million people signed up for Obama's text-messaging program. On the night Obama accepted the Democratic nomination at Invesco Field in Denver, more than 30,000 phones among the crowd of 75,000 were used to text in to join the program.